The Neanderthal was a very advanced bipedal ape with dark-world eyes and a six inch fur coat. His DNA is roughly halfway between ours and that of a chimpanzee and a bit closer to that of the chimp. His brain may have been a bit bigger than ours but it was dominated by the area of the brain associated with vision and that combined with the huge eyes tells us that his brain was to a large extent the neurophysiological equivalent of the circuitry for a military night vision system. Our brains are dominated by the area involved in complex logic.
That is total rubbish.
There's no evidence of either "dark-world eyes" or a "fur coat".
Neanderthal DNA is so close to ours there is evidence of human to Neanderthal interbreeding, which is impossible with chimpanzees.
It's said that non-African humans carry 2% to 4% Neanderthal DNA and that all-told, more than half of Neanderthal DNA is still present, scattered in humans worldwide.